Multiscale carbon fibre–reinforced polymer ( CFRP ) composites containing carbon nanotubes with tailored interfaces

2019 ◽  
Vol 42 (7) ◽  
pp. 1521-1533 ◽  
Author(s):  
Raquel M. Santos ◽  
Diogo Vale ◽  
Jéssica Rocha ◽  
Carla Martins ◽  
Sacha T. Mould ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Fibre ◽  
Reinforced Polymer ◽  
Cfrp Composites ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

Effect of nanofiller on fibre laser drilling quality of carbon fibre reinforced polymer composite laminates

2018 ◽  
Vol 233 (4) ◽  
pp. 857-870
Author(s):  
Dhiraj Kumar ◽  
Kalyan Kumar Singh
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Fibre ◽  
Polymer Matrix ◽  
Composite Laminates ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Multi Walled Carbon Nanotubes ◽  
Fibre Reinforced Polymer ◽  
Walled Carbon Nanotubes

Laser machining of carbon fibre reinforced polymer composites is a challenging task due to a significant difference between physical and thermal properties of the constituent materials, i.e. polymer matrix and carbon fibres. This results in extended heat-affected zone (HAZ), taper kerf and poor surface finishing. This paper focuses on an investigation, attempting to minimise the divergence in the decomposition temperature of carbon fibres and epoxy resin by adding multi-walled carbon nanotubes in polymer matrix as a secondary reinforcement. High thermal conductivity of multi-walled carbon nanotubes increases the thermal diffusivity of polymer matrix, which in turn reduces the matrix recession. In addition, laser power and scan speed was also considered as an input parameter and their influence on output responses such as HAZ, taper angle and surface roughness has been studied. To analyse the effect of multi-walled carbon nanotubes on the resultant thermal damage, an innovative technique, i.e. scanning acoustic microscopy was used. This technique provides a ply-by-ply damage analysis. C-scans of the top and bottom surface of the machined holes in the composite were also carried out. Further, micrographs of the holes were taken to analyse the quality of the holes using field-emission scanning electron microscope. The obtained results indicated that HAZ, taper angle and surface roughness of holes decreased by ∼30%, ∼47% and ∼43%, respectively, with 1.5 wt% multi-walled carbon nanotubes doped carbon fibre reinforced polymer laminates, when compared with the results obtained from experiments with neat carbon fibre reinforced polymer composite laminates.

scholarly journals Flexural Properties of Chopped Kenaf and Carbon Fibre Reinforced Polymer Composites Embedded with Carbon Nanotubes

2019 ◽  
Vol 8 (4) ◽  
pp. 6842-6846
Keyword(s):  
Carbon Nanotubes ◽  
Flexural Strength ◽  
Carbon Fibre ◽  
Polymer Composites ◽  
Flexural Properties ◽  
Specimen Thickness ◽  
Reinforced Polymer ◽  
Roll Mill ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

An experimental study was performed to investigate the flexural behaviour of chopped kenaf and carbon fibre reinforced polymer composites embedded with carbon nanotubes (CNT). The fibre content in the composites was 10 wt.% with three different CNT loadings, which were 0.5wt.%, 1.0wt.%, and 1.5wt.%. The CNT were dispersed in the epoxy resin using the mechanical stirrer and three-roll mill machine and mixed with the chopped fibres before being poured into the designated mould. Three-point bending tests were conducted with a specimen thickness and width of 4 mm and 10 mm, respectively, and a standard specimen length of 20% longer than the support span. The flexural test results showed that the chopped carbon fibre reinforced polymer (CFRP) with 0.5wt.% CNT exhibited the highest flexural strength and modulus (42 MPa and 2.9 GPa, respectively) compared to other composites with 1.0wt.% and 1.5wt.% CNT loading. The chopped kenaf fibre reinforced polymer (KFRP) composite with 0.5wt.% CNT loading showed the highest increase in the flexural strength and modulus, at 30 MPa and 2.8 GPa, respectively. Hence, it was concluded that the addition of CNT improved the flexural properties and 0.5 wt.% CNT was the ideal loading to enhance the flexural properties of chopped fibre-reinforced polymer composites.

scholarly journals Drilling of carbon fibre reinforced polymer (CFRP) composites: Difficulties, challenges and expectations

2021 ◽  
Vol 54 ◽  
pp. 284-289
Author(s):  
Norbert Geier ◽  
Jinyang Xu ◽  
Csongor Pereszlai ◽  
Dániel István Poór ◽  
J. Paulo Davim
Keyword(s):  
Carbon Fibre ◽  
Reinforced Polymer ◽  
Cfrp Composites ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

scholarly journals Recent advances in electromagnetic interference shielding properties of carbon-fibre-reinforced polymer composites—a topical review

2021 ◽  
Author(s):  
E. Mikinka ◽  
M. Siwak
Keyword(s):  
Carbon Fibre ◽  
Electromagnetic Interference ◽  
Reinforced Composites ◽  
Emi Shielding ◽  
Reinforced Polymer ◽  
Cfrp Composites ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Shielding Properties ◽  
Fibre Reinforced Composites

AbstractUsing carbon-fibre-reinforced polymer (CFRP) composites for electromagnetic interference (EMI) shielding has become a rapidly emerging field. This state-of-the-art review summarises all the recent research advancements in the field of electromagnetic shielding properties of CFRP composites, with exclusive attention paid to experimental work. It focuses on (1) important mechanisms and physical phenomena in the shielding process for anisotropic carbon-fibre composites and (2) shielding performance of CFRP materials as reported in the literature, with important performance-affecting parameters. The key properties which directly influence the shielding performance are identified, the most critical being the carbon-fibre concentration along with length for discontinuous carbon-fibre-filled polymers and the lay-up for continuous carbon-fibre-reinforced composites. The effect of adding conductive inclusions such as metal or carbon nanotubes is also reviewed. It is emphasised that processing conditions are strongly linked with the shielding properties of a composite. This is a first review, which covers all the recent advancements in the field of shielding properties of carbon-fibre-reinforced composites, with detailed analysis of factors influencing these properties and clear distinction between continuous and discontinuous reinforcement. It is shown that CFRP composites make a good candidate as an EMI shielding enclosure material.

scholarly journals Characterization of a New Dry Drill-Milling Process of Carbon Fibre Reinforced Polymer Laminates

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1470 ◽  
Author(s):  
Alessandra Caggiano ◽  
Ilaria Improta ◽  
Luigi Nele
Keyword(s):  
Carbon Fibre ◽  
Tool Path ◽  
Current Trend ◽  
Milling Process ◽  
Peripheral Milling ◽  
Reinforced Polymer ◽  
Orbital Drilling ◽  
Cfrp Composites ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

Carbon Fibre Reinforced Polymer (CFRP) composites are widely used in aerospace applications that require severe quality parameters. To simplify the assembly operations and reduce the associated costs, the current trend in industry is to optimize the drilling processes. However, the machining of CFRP composites is very challenging compared with metals, and several defect types can be generated by drilling. The emerging process of orbital drilling can greatly reduce the defects associated with the traditional drilling of CFRP, but it is a more complex process requiring careful process parameters selection and it does not allow for the complete elimination of the thrust force responsible for delamination damage. As an alternative to traditional and orbital drilling, this work presents a new hole making process, where the hole is realized by a combination of drilling and peripheral milling performed using the same cutting tool following a novel tool path strategy. An original tool design principle is proposed to realize a new drill-milling tool, made of a first drilling and a subsequent milling portion. Two different tool configurations are experimentally tested to evaluate the performance of the newly-conceived combined drill-milling process. This process is quick and easy, and the experimental results show an improvement in the drilled hole quality.

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